[TowerTalk] HAM IV Service Manual

[Adrian Rees]

Jim's idea of replacing the bolts with studs, is an excellent one. I'll certainly be doing this to my HAM IV's that I am overhauling at the moment.
 
I had a similar problem, and successfully extracted the sheared bolts with a Stud Extractor.If you havn't used one before they are easy to use, and most of the time, they will cure the problem. I soak the area in thin machine oil or penetrating oil, for a day or so. Then drill the required hole in the remainder of the bolt, screw in the extractor and start turning.I use a long socket handle to get lots of torque on the extractor.Generally it takes two or three short sharp pulls on the handle and the stud will start to turn. Once started it usually comes out fine.
 
I've never had to get something re-tapped. Including the engines I've extracted studs from. 
 
Hope this helps.
 
Adrian 
MW1LCR
 

________________________________

From: towertalk-bounces at contesting.com on behalf of Jim Rhodes
Sent: Mon 22/01/2007 12:54
To: towertalk at contesting.com
Subject: Re: [TowerTalk] HAM IV Service Manual



On my rotors I have replaced the bolts with studs, locktited and a
jam nut to keep them in place. Then when on the tower I just set it
on the plate & put flat, lock & nut on from the bottom. Before I
leave the ground I put some anti-seize on the threads of the nuts (&
the spares). One of them has been drilled out to 5/16" holes (bought
used that way) the other has stock 1/4". Makes rotor swap a breeze.

At 01:27 PM 1/21/2007, Mike Holley wrote:
>My Name is Mike Holley VE7AVM and have two HAM IV Rotators in service  but
>on removing one  which had become defective  for bench overhaul  three out
>of the four mounting bolts  snapped off in the  attempt to unscrew from the
>tower mounting plate , every effort has been made to remove the bolts from
>the casting but with out success  . My next step would be to replace the
>casting  but  as I do not have the service manual  I have no idea of the
>current part number  ,I have written to "Hy Gain "   to try to purchase a
>Service Manual but to this date no response  . Can any one help please .
>The data stamped on the bottom of the casting is H4 S1  JUL 81
>    Mike Holley VE7AVM
>  mikeholleu at shaw.ca
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Jim Rhodes K0XU
jim at rhodesend.net

Experience is the thing you have left when everything else is gone.
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